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Optimum Calculation of Coal Pillars in Inclined Weathered Oxidation Zone

Yingbo Zhang1, Shi Chen1,2,*
1 College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, 712100, China
2 Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, Yangling, 712100, China
* Corresponding Author: Shi Chen. Email:

Energy Engineering 2021, 118(3), 707-714. https://doi.org/10.32604/EE.2021.013888

Received 25 August 2020; Accepted 23 November 2020; Issue published 22 March 2021

Abstract

In the mining process of coal mine, waterproof coal pillars should be set between the weathered oxidation zone and the first mining face. In order to determine the reasonable upper limit of the first mining face of Hongyi Coal Mine, the waterproof coal pillar needs to be wide enough to resist the lateral hydrostatic pressure of the oxidation zone, and to ensure that the top plate aquifer does not run through the water guide crack zone, while also liberating as much stagnant coal as possible. In this paper, the first coal mine face’s waterproof coal pillar was calculated using conventional and optimized calculation methods, taking into account the dip angle of the coal seam, the height of the water-guide crack zone, and the rock shift influence zone, and finally the upper limit of the first face of Hongyi Coal Mine was determined.

Keywords

efflorescent oxygenized belts; upper limit; water flowing fractured zone; waterproof pillar

Cite This Article

Zhang, Y., Chen, S. (2021). Optimum Calculation of Coal Pillars in Inclined Weathered Oxidation Zone. Energy Engineering, 118(3), 707–714.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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